Electrical transport properties of Ag3Sn compound

The temperature behaviors of the electrical resistivity in polycrystalline Ag₃Sn bulk samples were investigated experimentally. We found that the temperature dependence of resistivity shows concave function characteristics from 305 down to 26 K, and can be described by a parallel resistor model H. Wiesmann et al., Phys. Rev. Lett. 38 (1977) 782]. The resistivities of all samples reveal T² behavior from 26 down to . We compared our data to the existing theories in which the T² dependence of resistivity has been proposed. However, we found none of them can describe the experimental data, and the physical mechanism of the T² behavior of resistivity at low temperatures is still enigmatical.